Patents by Inventor Diane Ryan

Diane Ryan has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Threaded spacer
    Patent number: 6371224
    Abstract: An improved thin walled threaded spacer for use in preventing thread galling in adjacent sections of drill pipe in a drill string is formed by mechanically deforming a strip of copper/beryllium alloy containing 2% beryllium to form a preform having a hollow, truncated conical section and then mechanically deforming the conical section to impart helical grooves therein.
    Type: Grant
    Filed: March 9, 2000
    Date of Patent: April 16, 2002
    Assignee: Brush Wellman, Inc.
    Inventors: Stephen Freeman, David Krus, Donald Moracz, William D. Nielsen, Jr., Diane Ryan